This is not an issue as they are removed before the cake is served.
My pastry Chef always did the sugar paste flowers and secured them with the floral wire.
She kept the already made flowers in a drawer lined with paper towels.
I watched her make a scaffold on which she attached the flowers.
This went on the cake, then she hid the wiring with frosting.
When it was time to serve, she simply lifted the scaffolding away, removed the flowers and put them back in the...